Prevent gaps in beams of photons from powered clone

includes/powder.h

@@ -249,6 +249,7 @@
 #define PROP_SPARKSETTLE	0x20000	//2^17 Allow Sparks/Embers to settle
 
 #define FLAG_STAGNANT	1
+#define FLAG_SKIPMOVE	0x2 // skip movement for one frame, only implemented for PHOT
 
 #define GRAPHICS_FUNC_ARGS particle *cpart, int nx, int ny, int *pixel_mode, int* cola, int *colr, int *colg, int *colb, int *firea, int *firer, int *fireg, int *fireb
 #define GRAPHICS_FUNC_SUBCALL_ARGS cpart, nx, ny, pixel_mode, cola, colr, colg, colb, firea, firer, fireg, fireb

src/elements/pbcn.c

@@ -69,6 +69,11 @@ int update_PBCN(UPDATE_FUNC_ARGS) {
 						{
 							parts[r].vx = rx*3;
 							parts[r].vy = ry*3;
+							if (r>i)
+							{
+								// Make sure movement doesn't happen until next frame, to avoid gaps in the beams of photons produced
+								parts[r].flags |= FLAG_SKIPMOVE;
+							}
 						}
 					}
 				}

src/elements/pcln.c

@@ -59,6 +59,11 @@ int update_PCLN(UPDATE_FUNC_ARGS) {
 						{
 							parts[r].vx = rx*3;
 							parts[r].vy = ry*3;
+							if (r>i)
+							{
+								// Make sure movement doesn't happen until next frame, to avoid gaps in the beams of photons produced
+								parts[r].flags |= FLAG_SKIPMOVE;
+							}
 						}
 					}
 				}

src/powder.c

@@ -2214,6 +2214,12 @@ killed:
 
 			if ((t==PT_PHOT||t==PT_NEUT||t==PT_ELEC)) {
 				if (t == PT_PHOT) {
+					if (parts[i].flags&FLAG_SKIPMOVE)
+					{
+						parts[i].flags &= ~FLAG_SKIPMOVE;
+						continue;
+					}
+
 					rt = pmap[fin_y][fin_x] & 0xFF;
 					lt = pmap[y][x] & 0xFF;